Using bacon grease to cook fish and other things used to be common practice until we learned about the adverse health issues.  When I first went to Quetico we went to Lonely Lake in 1969 with our fearless leader who was the high school shop teacher and assistant football coach.  You were eligible to go after you graduated from high school and he invited you to come.  For breakfast we fried up a bunch of bacon and used the grease to fry eggs.  The eggs were tasty, but all that grease could give you heart burn.  Today the thought of frying eggs in bacon grease really seems gross.